Ok try this ........ in the A7 socket push the button 4 times,then when the light comes back on push it 1 time, then5 times, then 1 time wait and the led will flash on and off ( you have to watch very closely as it flashes very rapidly) if this doesn't work there is only one other thing to do .... Volvo put two different instrument clusters in cars in 1995, if the first reset doesn't work then the reset will be on the face of the cluster, near the trip reset, and th reset is just like earlier cars you push the button with a pick or something similar. the button is recessed and it is the only one that is.
Good luck!!!